题干

爬行动物体表覆盖鳞片或甲,其作用是(  )

A:适应陆地生活

B:有利于爬行

C:减少体内水分蒸发

D:保持体温

上一题 下一题 0.0难度 选择题 更新时间:2019-05-26 01:46:34

答案(点此获取答案解析)

C

同类题2

阅读下文,回答相关问题。

         “不过也说不定是将军家的狗……”巡警把他的想法说出来,“它的脸上又没有写个……前几天我在将军家院子里看见过这样一条狗。”
         “没错儿,将军家的!”人群里有人说。
         “哦,……叶尔德林老弟,给我穿上大衣吧……好象起风了,挺冷……你把这条狗带到将军家里去,问问清楚。就说这条狗是我找着,派人送上的。告诉他们别再把狗放到街上来了。说不定这是条名贵的狗;可要是每个猪思子都拿烟卷戳到它的鼻子上去,那它早就毁了。狗是娇贵的动物……你这混蛋,把手放下来!不用把你那蠢手指头伸出来!怪你自己不好! 
         “将军家的厨师来了,问他好了——喂,普洛何尔!过来吧,老兄,上这儿来!瞧瞧这条狗,是你们家的吗?”
         “瞎猜!我们那儿从来没有这样的狗!”
         “那就用不着白费工夫再上那儿去问了,”奥楚蔑洛夫说,“这是条野狗!用不着白费工夫说空话了。既然普洛何尔说这是野狗,那它就是野狗。弄死它算了。”
         “这不是我们的狗,”普洛何尔接着说,“这是将军的哥哥的狗。他哥哥是前几天才到这儿来的。我们将军不喜欢这种小猎狗,他哥哥却喜欢。” 
          “他哥哥来啦?是乌拉吉米尔•伊凡尼奇吗?”奥楚蔑洛夫问,整个脸上洋溢着含笑的温情,“哎呀,天!我还不知道呢!他是上这儿来住一阵就走吗?”
“是来住一阵的。”
          “哎呀,天!他是惦记他的兄弟了……可我还不知道呢!这么说,这是他老人家的狗?高兴得很……把它带走吧。这小狗还不赖,怪伶俐的,一口就咬破了这家伙的手指头!哈哈哈—…•得了,你干什么发抖呀!呜呜……呜呜……这坏蛋生气了……好一条小狗……”

同类题3

阅读理解

    Most of us have been in this situation: You're on your way to your friend's house, then you suddenly ask yourself,"Did I remember to turn the lights off?” For those with "smart homes", however, this wouldn't be a problem.

Over the last few years,smart home technology has become more popular. Thanks to user-friendly products like intelligent lighting and heating controllers, people can control nearly every electrical item in their homes from anywhere in the world.

    While smart homes aren't new, companies like Philips, Amazon and Xiaomi have finally brought automation to everyday people with affordable products like artificial intelligence(AI) speakers and sensors.

    “The obvious message is that you can stop wasting energy,” Tom Kerber, director of research for U. S -based digital company Parks Associates, told The Guardian.

    And the technology also has more meaningful uses. In Norway, for example, one company is using smart tech to make life easier for its elderly customers. Abilia's system allows carers to check up on patients through a tablet on a wall inside their home. The device sends patients reminders about tasks, such as when they need to take medication(冥想). It can even tell carers if there's any unusual activity in the home that could be life-threatening.

    “This kind of system allows people to take care of themselves, which is the most important thing,” Abilia's vice president, Oystein Johnsen, told the BBC. "It also saves the government money. In Norway, it costs 1 million kroner(about 0. 8 million yuan )per year to have someone in a care home. This system costs 15,000 kroner a year.”

    So, for those who have already "gone smart", will it ever be possible to go back to do things in the old-fashioned way? "I think it would be difficult. When we go to a friend's house or on vacation we find ourselves expecting the house to do things for us that we should do, "Poulson, 35, a senior program manager from Seattle.,U. S.,explained.